Osteosarcoma of the distal femur

Case contributed by A.Prof Frank Gaillard

Presentation

Right knee pain.

Patient Data

Age: 17 years
Gender: Female
X-ray

Knee x-ray

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Nuclear medicine

Bone scan

Delayed phase bone scan image demonstrates intense uptake in the distal right femur. A single focus of increased attenuation projects just to the right of the sternum inline with the chondral cartilage of the third rib. No other suspicious lesions identified. 

MRI

MRI knee

MRI through the lesion demonstrates a soft tissue mass completely replacing the medullary cavity and extending into the adjacent soft tissues. It is low to intermediate in signal on T1 and high on T2 weighted images. 

Diagram

Distribution of osteosarcomas

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This patient went on to have surgery and an osteosarcoma was histologically confirmed. 

X-ray

Post op

A limb sparing resection has been performed. The distal femur and adjacent tibial plateau has been resected and a total knee replacement inserted. 

Case Discussion

This case demonstrates relatively typical appearances of a bone forming osteosarcoma of the distal femur (typical location) in a 17 year old (typical age). 

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Case information

rID: 7529
Case created: 6th Nov 2009
Last edited: 27th Nov 2015
Inclusion in quiz mode: Included

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